amazon-dash-watcher.sh

#!/bin/sh

# The mac address of your Dash. Like: 74:75:48:b9:80:fb
MACADDR=

# Number of seconds to wait in between checks
INTERVAL=3

# Number of seconds to sleep after the button is pressed
WAITFOR=60

# Command to run when the button is hit

# Ensures that there is only a single instance of this script running
ME=`basename $0`
RUNNING=`ps | awk '/'"$ME"'/ {++x}; END {print x+0}'`
if [ "$RUNNING" -gt 3 ]; then
   echo "Another instance of \"$ME\" is running"
   exit 1
fi

while sleep $INTERVAL
do

    # Search for the mac address of the
    SEARCH=`ip neigh | grep "$MACADDR"`
    if [ -n "$SEARCH" ]; then
        # Debug message
        echo "Dash Found."

        # Command to run when the button is hit
        # echo `wget -U "**my-secret-user-agent**" -O /dev/tty "http://example.com/test.php?secret=key&type=twitter&msg=I%20just%20pressed%20my%20Amazon%20Dash%20button"`

        echo "Sleeping for $WAITFOR seconds"
        sleep $WAITFOR
    else
        # Debug message
        echo "Dash not found"
    fi

done